Intermediate Spectrometer With 30mm Optics, 1 Each

The Intermediate Spectrometer With 30mm Optics by United Scientific is a classroom spectrometer for measuring wavelengths, prism angles and refractive index. Its 30 mm diameter optics give brighter line images than the standard model, and it features an illuminated autocollimator, 17.8 cm divided circle and double-ended vernier reading to 1'. Supplied with a 300 lines/mm grating, prism and power supply, it suits college and advanced high school physics labs.